Stool



FIG. 1 is a front, rear, left, and right side view of a stool embodying the present invention;

FIG. 2 is a top view of the stool of FIG. 1; and,

FIG. 3 is a bottom view of the stool of FIG. 1.

The broken lines shown in the drawings depict portions of the article that form no part of the claimed design. 

CLAIM We claim the ornamental design for a stool, as shown and described. 